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jkelly24 | 12:01 Sat 07th Oct 2006 | Quizzes & Puzzles
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where in real life might the number 22.5 occur
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It's common in carpentry and woodworking. It's half of a 45 degree angle and the angle you would use to make an octagon.
It is also the point at which a ship's navigation lights must become obscured, 22.5 degrees abaft the beam.

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